Discussions By Condition: Nerve conditions

Please explain PDD-NOS

Could someone please explain this. Would this be what someone has if they're very literal, have a few minor repetitive behaviors, etc., but function well socially. I do this quite often; the only problem I have is, sometimes I have to go over in my mind what I want to say a little more than most. But, once I'm in a conversation, I tend to be really good, and I enjoy listening to other people. Still, I tend to be quite literal at times. I do have Dandy-Walker Syndrome, but I've not heard that this is part of D-W.